X-Git-Url: http://git.kpe.io/?p=kmrcl.git;a=blobdiff_plain;f=lists.lisp;h=285bb397f426333f8b3eac243144c8704d08eb05;hp=ed2148ee347cba703e88b21cd44a1f400df42288;hb=e83a72f1e88062d7e17ac77c17cc9c32d51f3c13;hpb=0f12822c9d49849c26424743b3744d26056be4cc

diff --git a/lists.lisp b/lists.lisp
index ed2148e..285bb39 100644
--- a/lists.lisp
+++ b/lists.lisp
@@ -7,7 +7,7 @@
 ;;;; Programmer:    Kevin M. Rosenberg
 ;;;; Date Started:  Apr 2000
 ;;;;
-;;;; $Id: lists.lisp,v 1.6 2003/06/18 17:12:29 kevin Exp $
+;;;; $Id: lists.lisp,v 1.8 2003/07/05 02:32:08 kevin Exp $
 ;;;;
 ;;;; This file, part of KMRCL, is Copyright (c) 2002 by Kevin M. Rosenberg
 ;;;;
@@ -166,7 +166,14 @@
       ((null pl) alist)
     (setq alist (acons (car pl) (cadr pl) alist))))
 
-(defun get-plist (key plist &key (test 'eql) (missing nil))
-  (let-if (pos (member key plist :test test))
-	  (cadr pos)
-	  missing))
+(defmacro update-plist (pkey value plist &key (test '#'eql))
+  "Macro to support below (setf get-alist)"
+  (let ((pos (gensym)))
+    `(let ((,pos (member ,pkey ,plist :test ,test)))
+       (if ,pos
+	   (progn
+	     (setf (cadr ,pos) ,value)
+	     ,plist)
+	 (setf ,plist (append ,plist (list ,pkey ,value)))))))
+
+